Conductor and contact for electrical glow-lamps.



No. 672,639. Patented Apr. 23, mm.

J. A. HALFURD. CONDUCTOR AND CONTACT FUR ELECTRICAL GLOW LAMPS.

' 7 (Application filed Jan. 21, 1901.)

(No Model.)

" I dated August 31, 1900; inRussia,d-ated Au-' 3 UNITED STATES ATENT FFICE.

JULIAN HALFORD, OF BAYSWATER, ENGLAND, ASSIGNOR TO THE ELECTRIC LIGHTING BOARDS, LIMITED, OF LONDON, ENGLAND.

CONDUCTOR AND CONTACT FOR ELECTRICAL GLOW-LAMPS.

SPECIFICATION forming part of Letters Patent N 0. 672,639, dated April 23, 1901 Application filedJannary 21, 1901. Serial No. 44,150. (No model.)

To all whowt it mayconcern:

I Be it known that 1, JULIAN ADOLPHE HAL- I I FORD, a citizen of England, residing at 22 "Ghepstow Villas, Bayswater, in the county of London, England, have invented certain new anduseful Improvements in Conductors and I Contacts for Electrical Glow Lamps, (for I whicha patent has been obtained in Belgium, ;dated September 1, 1900, No. 151,862, and in France, dated September 1, 1900, No. 303,440,

and for which application for a patent has been made in Germany, dated September 1,

I 1900; in Austria, dated September 3, 1900; in wIIungary, dated September 6, 1900; in Canada,

dated September 11 and 12, 1900; in Italy, dated Septemberl, 1900; in Switzerland,

gust 24:, 1900; in Denmark, dated September 7 3,1900; in Sweden, dated September 4, 1900;

have been madehaving their leading-in wires connected toIa pair of conducting-spikes, and

in New Zealand, dated October 13, 1900; in

Victoria, dated October 1, 1900; in'New South I Wales, dated October 2, 1900; in Queensland, dated October 4, 1900; in South Australia, dated November 15, 1900, and in GreatBi-itain, dated April 10, 1900, No. 6,727,) of which 1 the followingis a specification. I i

Electric glow-lamps and stands for ihem made with pairs of}covered penetrable conducting-strips laid side by side onthem, the

I stripsof eachIpair connected to opposite terurinals of a sonrceof electricity, so that on thi-usting the two spikes of a lamp or its stand one into each strip they make contact and the lamp becomes at once supplied with cur-I rent. 1 I i The present invention, (which was originally includedin. my application filed September 10, 1900, Serial No. 29,581) relates to the construction of conductors for supplying with current lamps, stands,or other connections, each provided with a pair of spikes of the kind above referred to, the main object ofthe invention being to provide in apartments, shop-windows, advertising sites, or

other places convenient means of placing glow-lamps at various points and in various orders along conducting-lines, as will be de the dovetail.

Figs. 3 and 4, the head of a lamp Z has fitted.

scribed with reference to the accompanying drawings.

Figure 1 is a section of a conducting-bar such as might be fixed along a ceiling to receive at intervals a connection fitting. Fig. 2 is a section of such a fitting turned one-quarter around. Fig. 3is a side view, and Fig. lis a sectional plan on line X X, of the head of a lamp adapted to be held in the bar shown in Fig. 3. 1

When a support or conducting-bar is fixed in an inverted position-as, for instance, along a ceiling-it is preferred to provide means of securing the lamp or fitting suspended fromit besides the mere frictional hold of the spikes. For this purpose the wood strip a, besides having its grooves and conductors arranged as above described, has its two sides obliquely undercut to form a dovetail ff, and the connection-fitting g, which is provided with spikes penetrating the conductors, is made with asheath h, that can revolve around the fitting. 'lhissheath is made with aconical head it, from which parts' are cut off on opposite sides to form flats. The sheath being turned to such a position that the fiat sides of its head are parallel to the dovetail)", the fitting is pushed up so that its spikespenetrate the two conducting-bundies 17. l The sheath is then turnedonequarter around, so that its ooned head kis held in In like manner, as shown in on it a conical ring m, having two flat sides it. By turning the ring m so as to present its flat sides parallel to the dovetail, thrusting the spikes into the conducting-bundles b, then turning the ring one-quarter around so as to engage in the dovetail, the lamp is firmly held.

Having thus described the nature of this invention and the best means I know of carrying the same into practical effect, I claim- 1. Asupport provided Withsuitable grooves, electrical conductors mounted therein, a lamp, spikes connected to said lamp and adapted to penetrate said conductors, and means carried by said lamp and adapted to engage in said groove for connecting the lamp to the support. I

2. The combination with a support pro- I my hand in presence of two subscribing Witv i'ded with electrical conductors, of a lamp, nesses.

spikes carriedthereby and adapted to penev trate said conductors, and a rotatable conical JULIA-N HALFORD' I I .5 ring carried by said lamp and engaging in Witnesses:

said support for connecting the lamp thereto. GERALD L. SMITH,

In testimony whereof I have hereunto set EDWARD GARDNER. 

